一种SDH over WDM自愈方案

A Survivable Solution for SDH over WDM Networks

研究了 ＳＤＨ／ＷＴＭ多层传送网结构中的自愈问题，提出了一种用于 ＳＤＨ ｏｖｅｒ ＷＤＭ的自愈方案。该方案采用了有保护的ＳＤＨ层架构在无保护的ＷＤＭ光层的体系结构，根据不同节点对间业务量的大小和恢复时间要求的不同，分别采用基于光路的１＋１复用段保护和双光路双向复用段倒换环来提供传输和保护，满足了不同业务对自愈性能的需求，可实现快速有效的自愈。

A Survivable Solution for SDH over WDM networks is proposed in this paper The key issues associated with lightpath-based 1+1 multiplex section protecion (MSP) and 2 optical channel multiplex section/shared protection ring (2OCH MS/SPRing) are discussed. According to the requirements of transfer rate and recover time of the traffic between different node pairs, lightpath-based 1+1 MSP and 2OCH MS/SPRing are chosen to provide efficient transporting and protection functions. With protected SDH over unprotected WDM optical layer, all the traffic can be protected efficiently.